9.1 is low for that cam,IMO
At your stated ~7.5 Dcr the cranking pressure is likely to be about 145psi,but it's a slow-ramp comp, so who knows what the pressure will truly be.
The A999 will be a welcome relief, as the starter TM climbs to 7.56. That's gonna be a big help.
I ran mine at 10.9Scr @185psi. (aluminum heads). That made it a dump-the-clutch deal with a starter gear of 9.44;my favorite iteration. I loved that cam. I was very sad when the lobes starting falling off it.
